AG87BJS150019FSSS.pdf

109 – MEASUREMENT AND PAYMENT

109.1 General. Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work and materials will be considered incidental to and included in the payment of the pay items in the Schedule of Items. .

Payment will be for all labor, equipment, transportation, supervision, operating supplies, materials, and incidentals necessary to complete the work as specified.

Work measured and paid for under one pay item will not be paid for under any other pay item.

109.2 Units of Measurement. Payment will be by units defined and determined according to U.S. standard measure and by the following.

(A) Lump Sum (LS) The quantities that denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

(B) Linear Foot (LF) Measurement of 12 inches along a reference line.

(C) Cubic Yard (CY) The measurement computed by the average end area method from measurements made longitudinally along a centerline of reference line.

(D) Each (EA) One complete unit which may consist of one or more parts. The quantity is the actual number or units completed and accepted.

(E) Hour (H) Measurements will be for the actual number of hours performed by the contractor.

(F) Square Foot (SF)Measured on a plane parallel to the surface being measured.

109.4 Methods of Measurement. One of the following methods of measurement for determining payment is Designated on the Schedule of Items for each Pay Item.

(A) Actual Quantities. (AQ) these quantities are determined from measurements of completed work.

(B) Lump Sum Quantities. (LSQ) these quantities denote one complete unit of work as required by or described in the contract, including necessary material, equipment, and labor to complete the job.

(C) Contract Quantities. (CQ) These quantities denote the final number or units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations and drawings. Changes in the number of units Designated in the Schedule of Items maybe authorized under the following:

1. As a result of changes in the work approved by the CO.

2. As a result of the CO determining that errors exist in the original design that cause a

Pay Item quantity to change by 15 percent or more.

3. As a result of the contractor submitting to the CO a written request showing evidence of errors in the original design that cause a Pay Item quantity to change by 15 percent of more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the design

109.05 Scope of Payment. Payment for contract work is provided, either directly or indirectly, under the pay items listed in the bid schedule.

(a) Direct payment. Payment is provided directly under a pay item listed in the bid schedule when one of the following applies:

(1) The work is measured in the Measurement Subsection of the Section ordering the work and the bid schedule contains a pay item for the work from the Section ordering the work.

(2) The Measurement Subsection of the Section ordering the work, references another Section for measuring the work and the bid schedule contains a pay item for the work from the referenced Section.

(b) Indirect payment. Work for which direct payment is not provided is a subsidiary obligation of the Contractor. Payment for such work is indirectly included under other pay items listed in the bid schedule. This includes instances when the Section ordering the work references another Section for performing the work and the work is not referenced in the Measurement Subsection of the Section ordering the work.

Compensation provided by the pay items included in the bid schedule is full payment for performing contract work in a complete and acceptable manner. Risk, loss, damage, or expense arising out of the nature or prosecution of the work is included in the compensation provided by the pay items.

Work measured and paid for under one pay item will not be paid for under other pay items.

The quantities listed in the bid schedule are approximate unless designated as a contract quantity. Limit pay quantities to the quantities staked, ordered, or otherwise authorized before performing the work. Payment will be made for the actual quantities of work performed and accepted or material furnished according to the contract. No payment will be made for work performed in excess of that staked, ordered, or otherwise authorized.

151 – MOBILIZATION

151.01 Description

This work consists of moving personnel, equipment, material and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the costs associated with obtaining permits, insurance, and bonds. Mobilization is not intended to pay the costs of materials before they are used on the project site. Work also includes cleaning of all equipment used at the project site. Clean all construction equipment prior to entry on the project site. Remove all dirt, plant parts and material that may carry noxious weed seeds into the area. Only construction equipment inspected by the Forest Service will be allowed to operate within the project area. Treat subsequent move-ins of equipment the same as the initial move-in. Clean truck beds and dump boxes hauling to the project site prior to entering the work area.”

Payment

151.02 Basis. Pay for the accepted work at the contract unit price for the PAY ITEM SHOWN

IN THE SCHEDULE OF ITEMS.

(a) Reimburse for bond premiums before issuing the Notice to Proceed if evidence of payment is received.

(b) When 5 percent or more of the original contract amount is earned from other PAY

ITEMS, pay mobilization at the rate of 50 percent, or up to 5 percent of the original contract amount, whichever is less.

(c) When 10 percent or more of the original contract amount is earned from other PAY

ITEMS, pay mobilization at the rate of 100 percent, or up to 10 percent of the original contract amount, whichever is less.

(d) Pay any unpaid amount for mobilization upon final acceptance of all work items.

Make payment under:

PAY ITEM PAY UNIT

151 Mobilization …………………………………………………………..LS

309 – SOLAR PUMPING SYSTEM

• The submersible pump/motor and solar panels shall provide the stock water called for on the schedule of items. All wiring shall conform to State and National electrical code.

• The pump/motor shall have surge protection,built in sand shield and a low water shutoff.

• The drop pipe shall be 160psi High density polyethlene 1” diameter.

• The pump/motor wire shall be minimim 12 gage.

• The solar panels shall be mounted on a support structure with an adjustable tilted angle to ensure optimum exposure to the sun.

• The mounting pipe for the solar panels shall be 3.5” outside diameter schedule 40 or 80 galvanized steel post placed in a 4’ deep, 2’diameter hole and set in concrete. The bottom of the solar panels shall be minimum 5’ above the ground.

• The solar panel mounting syatem shall be constructed to withstand 90 mph wind. The panel mounting frame shall be 6000 series structural aluminum with stainless steel mounting hardware.

• The manufacturer shall warranty the system in the event the system is installed by a non certified installer.

312 - WATER WELL CONSTRUCTION

PART 1 - GENERAL

1.1 SCOPE. The work to be completed under this contract includes the transportation, equipment, labor, and materials necessary for the construction of the proposed water wells in this contract. Well sites will be staked on the ground by the Forest Service.

1.2 PERMITS, LAWS AND ORDINANCES. The Contractor shall, at his own expense, obtain all certificates and licenses required of him by law for the execution of this contract.

The Contractor shall comply with all Federal, State, or local laws and regulations relating to the performance of the work in this contract.

PART 2 - PRODUCTS

2.1 PROTECTIVE PLASTIC WELL CASING. Four inch I.D. Polyvinyl Chloride (PVC) SDR 21, NSF approved for potable water. Casing and joints to conform to ASTM F 480-89.

2.2 SLOTTED WELL CASING . Same size and specifications as PVC casing.

PART 3 - EXECUTION

3.1 DRILLING AND CASING.

A. A well hole of suitable size to permit the installation of the protective casing shall be drilled and cased by the Contractor for the entire depth of the well or as approved by the C.O.R.

B. The well shall be drilled and the casing installed with sufficient accuracy in the vertical alignment so as not to interfere with the installation and operation of the pump.

C. Packers that are to be installed shall be of a material that will not impart taste, odors, toxic substances or bacterial contamination to the water in the well.

3.2 GROUTING REQUIREMENTS

A. Concrete grout. The mixture should consist of proportionate amounts of cement and sand mixed with clean water.

B. Cement grout shall be a mixture of 1 bag of Portland cement (94 pounds) and 5 to 6 gallons of water. Up to 5% commercial bentonite clay, by weight, may be added.

C. Bentonite clay grout. A sodium-base bentonite clay grout may be used to fill the annular space when thermoplastic casing is used. The mixture must consist of not less than two pounds of bentonite clay per gallon of clean water.

D. Grout application. The annular opening between the protective casing and the natural ground shall be filled with grout. The grouting shall be done continuously and in such a manner that will force the grout item from the bottom of the hole toward the ground surface. Grout shall be at least 1.5 inches thick around the well casing. Surface grouting shall be a minimum of 20 feet to the ground surface or to the bottom of the pitless unit when one is used.

3.3 DEVELOPMENT.

The Contractor shall make such necessary tests at each water stratum encountered. The Contractor shall furnish all necessary pumps, compressors, plungers, bailing or other needed equipment and shall develop the well by such approved methods as shall be necessary to give the maximum yield of water per foot of drawdown and extract from the well the maximum practical quantity of such sands as may, during the life of the well, be drawn through the screen when the well is pumped under maximum conditions of drawdown.

3.4 SCREENING.

Because of uncertainty as to depth and type of water-bearing strata which may be encountered and utilized, the following alternatives will be considered:

(1) open bottom casing.

(2) PVC slotted casing or stainless steel screen, which will complement the type of casing being used.

A. Screening. In the event a screen is considered, the Contractor shall provide a one-quart sample of the water-bearing strata to the C.O.R. along with his preliminary recommendation as to screen length and slot size opening to be used. Silica sand, sand or gravel packing shall be used in conjunction with the screen. Screen openings shall provide the maximum amount of open area consistent with the grading of the water-bearing formation and gravel pack and shall permit maximum transmitting ability without clogging or jamming.

If mutual agreement cannot be reached as to screen slot size or type, the selected sample of water-bearing formation shall be analyzed by the screen manufacture.

B. Gravel Pack. If the C.O.R. elects to use an open bottom casing, a gravel pack shall be placed in the bottom of the well according to the following:

1. Gravel shall pass a 1/4-inch screen and be retained on a No. 30 screen, and shall be well graded and composed of hard, durable particles.

2. The gravel shall extend a minimum of 5 feet below the bottom of the casing and a minimum of 3 feet up into the casing from the bottom, for a total of at least 8 feet.

C. Casing Cleaning. The casing shall be thoroughly swabbed, using alkalies, if necessary, to remove oil, grease, or joint dope. This work shall be considered necessary work to the accomplishment of the contract.

3.5 TEST PUMPING FOR YIELD AND DRAWDOWN.

A. Time to Test. After the well has been completely constructed, developed, cleaned out, and the depth of the well accurately measured, the Contractor shall notify the C.O.R. and make the necessary arrangements for conducting a final pumping test.

B. Test Pump. The Contractor shall furnish and install necessary pumping equipment capable of pumping to the required point of discharge. He shall also furnish equipment for measuring the flow of water.

C. Pumping Test. The Contractor shall test pump the well at 5, 10 and at near maximum rate (50-percent drawdown or slightly more) until drawdown and yield are constant at that rate. Drawdown may be considered constant when three measurements taken one hour apart are the same.The well shall also be test pumped at the maximum rate of flow which will not damage the water producing aquifers. Record drawdown and yield on the well log. During the pumping test, the drawdown in feet below static water level and pumping rate shall be measured and recorded at least every ten minutes until the drawdown stabilizes. After completion of test pumping, record water level recovery every ten minutes until static water depth is reached.

3.6 POLLUTION PROTECTION.

To assure ample drainage away from the well, the top of the casing shall be extended two feet above the surface of the ground and shall be mounded by earth fill. At completion of the well a well cap shall be installed on the top of the casing. The Contractor shall take such reasonable measures as necessary to prevent contamination of the well when work is not in progress at the site.

3.7 DISINFECTION.

The well shall then be disinfected with a chlorine solution which shall be of such volume and strength, and so applied, that a concentration of at least 50 parts per million of chlorine shall be obtained in all parts of the well for a period of at least 10 hours. This work shall be considered necessary work to the accomplishment of the contract.

3.8 WELL LOG AND SOIL SAMPLES.

The Contractor shall keep a complete well log containing entries for each stratum encountered. Samples from each water-bearing formation shall be kept in transparent plastic containers of approximately one pint capacity each and identified by labels showing the depth at which each was encountered. These plastic containers shall be furnished by the Contractor. The samples shall be given to the C.O.R. One copy of the driller's well log shall be submitted to the C.O.R. within 15 days after completion of the well.

REPRESENTATIVE OF CONTRACTOR.

The Contractor shall have an experienced foreman or driller, who is knowledgeable of the formations to be encountered, with full authority to act for the Contractor in directing all field operations, constantly in charge of the work at the site when the work is underway. This representative must be acceptable to the C.O.R. In event he becomes unacceptable, the Contractor upon written notice, will replace him within five (5) days with a representative acceptable to the C.O.R.

4.0 SUPERVISION.

Unless written instructions to the contrary are issued, the work under this contract shall be under the supervision of the C.O.R.who will require compliance with the terms of the contract. The presence or absence of the authorized representative, however, will in no way relieve the Contractor of the responsibility to prosecute all work diligently, thoroughly, and in accordance with the conditions and specifications presented herein. No payment will be made for loss of hole due to malfunction or failure of drilling equipment. Decisions regarding the abandonment of any site shall be at the sole discretion of the C.O.R.

4.1 ABANDONED WELLS.

Any abandoned wells shall be sealed with drill cuttings, bentonite chips or "bentonite gel" mixed at a ratio of one-half bentonite and one-half water.

315 - WELL PLUGGING

Sealing Abandoned Wells (SCS Interim Practice)

Definition - Sealing an abandoned water well is defined as sealing a well that has been determined to have no further beneficial use or whose use has been permanently discontinued.

SCOPE - This standard applies to sealing of drilled, driven, and dug vertical wells of 4" diameter or larger and 250 feet deep or less, constructed to supply water from an underground source.

Irrigation and other wells which require a water permit, flowing wells, known multiple-aquifer wells, or test wells constructed for geologic investigations are not covered by this standard.

Purpose. The purpose of this conservation practice is to preserve the quality of the ground water resource, to protect the public health, and to avoid unsafe conditions.

Conditions Where Practice Applies. This practice applies to abandoned wells where surface contaminants may flow into a well, where the well has a potential of being used for dumping contaminated debris, where undesired interaquifer flow may occur within the well and/or a safety hazard is created by the presence of the well.

A special concern when sealing abandoned wells will be to remove pumping equipment, garbage, or other debris and to use sanitized materials in sealing the well opening.

All work planned shall be in Compliance with Federal, State, and Local Laws and Regulations.

Design Criteria and Specification Guide. Preparation of the well for sealing. The pumping equipment and any obstacles or debris shall be removed from the well before sealing begins.

The depth of the well and the depth to water shall be measured. If practical, the well should be flushed by pumping in water or by use of an air compressor line. The well shall then be sanitized with household bleach before proceeding. The water in the well shall be brought to a 100ppm chlorine concentration before sealing.

A 100ppm chlorine solution will require:

1 gallon 5% chlorine bleach per 500 gallons of water

1 pint 5% chlorine bleach per 62 gallons of water

1.3 pounds high-test calcium hypochlorite tablets per 1000 gallons of water

Sealing Procedure. The entire well depth shall be filled with sealing materials as described below.

After sanitizing, the whole length of the well shall be sealed with neat cement. Neat cement shall be inserted in the well through a pipe from the bottom upward in one continuous operation.

The cement shall be stopped at three feet below the ground surface and topsoil used to fil the remainder after cutting off the well casing as described below. If there is free standing water present in the well prior to the placement of neat cement, the water shall be pumped or bailed out or its volume must be figured into the amount of water needed to formulate the neat cement. The well casing shall be cut off at this time to 3' below the ground surface. The remainder of the hole shall then be filled with topsoil, being careful to grade the soil so that surface water is directed away from the abandoned well location.

To determine the volume of materials needed per foot of depth or volume of water in the hole, use the following chart.

Table I.

Hole diameter

Volume per foot of depth

(inches) gal/ft cu. ft./ft.

0.7 1.5 2.6

4.1 5.9 8.0

10.5 16.4 23.6

53.0 94.2

0.1 0.2 0.3

0.5 0.8 1.1

1.4 2.2 3.1

7.1

12.6

Neat cement. Neat cement is a mixture of one bag (94 pounds of 1 cubic foot) of portland cement and 6 gallons of water. It is about the consistency of thick cream and can be pumped with special piston pumps. The mixture of one 94 pound bag of cement and six gallons of water yields a volume of 1.1 cu. ft.